The main reasons for sleeping with swollen hands at night are the following: 1. cervical spondylosis, because the nerves that govern the upper limbs are emitted from the cervical spine, if cervical spine osteophytes or herniated discs compress the nerves that govern the upper limbs, it can lead to the phenomenon of swollen hands when sleeping at night. 2. wrong sleeping posture, the body compresses one side of the hand, leading to difficulties in blood circulation in this side of the hand, and therefore the phenomenon of swollen hands. 3, Pay attention to rule out the presence of cerebrovascular disease, cerebrovascular disease, especially stroke patients, can cause paralysis of one side of the hand, which leads to difficulties in blood return, and therefore the phenomenon of hand swelling, it is recommended to go to the rehabilitation department of the hospital.